Katherine Gielissen, MD
NPI 1871868182 · Internal Medicine Physician · Atlanta, GA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Gielissen, MD is a Internal Medicine Physician provider in Atlanta, GA (NPI 1871868182).
Provider details
- NPI number
- 1871868182
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 95617 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
42 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 42 | $77 |
Typical Medicare-allowed amounts for these services range $77–$77 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 52 | 24 |
| Amlodipine Besylate | 36 | 18 |
| Gabapentin | 29 | 14 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 29 | 13 |
| Lisinopril | 27 | 13 |
| Metformin Hcl | 27 | — |
Practice location
Mailing address
Additional practice locations (1)
- 1405 Clifton Rd NeAtlanta, GA 30322-3220Phone: (404) 785-5437
Registry dates
- Enumerated
- 2012-03-20
- Last updated
- 2023-07-13
- Certified
- 2023-07-13
Frequently asked questions
- What is Katherine Gielissen's NPI number?
- Katherine Gielissen's National Provider Identifier (NPI) is 1871868182, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Gielissen's specialty?
- Katherine Gielissen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Gielissen located?
- Katherine Gielissen's practice location on file with NPPES is 80 Jesse Hill Jr Dr Se, Atlanta, GA 30303-3050.
- What is Katherine Gielissen's phone number?
- The practice phone number listed in the NPPES registry for Katherine Gielissen is (404) 616-1000.
- Does Katherine Gielissen accept Medicare?
- Katherine Gielissen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Gielissen's NPI active?
- Yes — Katherine Gielissen's NPI (1871868182) is active in the NPPES registry as of the last update on 2023-07-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.